Hectograph carbon and copy sheet assembly



'R V. BOWMAN HECTOGRAPH CARBON AND COY SHEET ASSEMBLY Nov. 28, 1939.

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4Patented Nov. 28, 1939r A .UNITED VSTATES HECTOGRAPH CARBON AND H SHEET ASSEMBLY Rich/ard V. Bowman, Philadelphia, Pa., assignor to Kee-Lox Manufacturing Company, Rochester, N. Y., #corporation of Newv York Application December 14, `19,38, Serial No. l245,693

"5 claims.

This invention relates to a hectograph carbon and copy sheet assembly, with particular reference to a combination of separate/carbon and copy-sheets so related thatkthe latter can b"e pre- 5 pared for use on either the spirit type orY rotary styleduplicating machines where the master copy is attached to a cylinder, or on the gelatin pad reproducer,'and itfhas for its object to afford a practical and economical construction in ,which the carbon and copyI sheets are 'held'together against accidental relative displacement by means that permits their quick and easy separation when desired, the relation of the sheets being such that the hectograph coated surface on the carbon sheet is `covered and protected by the" copy or record sheet. .t ,Y

One of the chief difficulties inthe use of hectograph coated carbon sheets is that the coating' material easily stains the lingers of the operator,

,it being diil'icult to remove such stains, and it isl a purpose of theinvention to provide a hectograph carbon coated sheet and a copy orrecord sheet which entirely covers and protects the hectograph coating so as to prevent the operators fingers from touching it when the .sheets are in their normal assembled relation, and which also enables the operator` to remove the copy or master sheet from the carbon sheet quickly and readily without at any time touching the carbon coatv ing. and furthermore permitting repeated use of such a carbon sheet by enabling the `operator to insert a fresh copy or record sheet, repetition of this process being possible 'until the hectograp carbon coating is entirely used. Another purpose .of the invention is to provide a construction in which the hectograph carbon coating can be on one weight or grade of paper best suited for the purpose, while the copy or record sheet can be of another or heavier grade of 40 paper, the two sheets being entirely separate and independent from each other, but held in interlocked or assembled relation by movable interengaging retaining means.

A further object of the invention is to provide a record orcopy sheet positioned over the carbon coated surface of a hectograph sheet, one of said sheets being provided with instrumentalities extending along opposite edges, overlying the outer surface of the other sheet and thereby holding the sheets in operativecopying relationship, affording means for enabling the operator to hold the carbon sheet with one hand while removing the copy or record sheet with the other hand without contacting the hectograph coating, the copy-or record sheet being provided with means extending be-l yond 'the carbon sheet for grasping it and separating the sheets. c

'I'he invention also has for an additional object the provision of means that enables positioning the sheets vin -a typewriter at different positions 5 in relation to the line'of writing when making successive copies, so that the carbon coating is uniformly used over the entire sheet by stagger- .-ing the lines of writing through the carbon coating in making successive copies. 1 10 To these and other ends, the 'invention consists in the construction and arrangement of parts that will appear clearly from the following description when read in conjunction with the accompanying drawing, the novel features being pointed out I6 in' the claims following the specication.

1n the drawing: Fig. 1 is a plan view of a preferred embodiment n of the invention looking toward the copy or record sheet, the latter being partially broken away; 20

' Fig. 2 is a similar view, with `the copy or record sheet removed, and showing'the retaining flanges or tabs of the carbon`v sheet unfolded;

. Fig. 3 is a view in elevation of the copy or record sheet removed from the carbon sheet; 25

Fig. 4 is a detail view partially broken away of the copy sheet with typewriting thereon, the recor`d from the carbon beingin reverse on the op-k posite sideof the sheet, for use with a rotary style duplicating machine; 30

Fig. 5' is a similar view Aof the opposite side of the copy sheet showing the record as used on the duplicating machine;

Fig. 6 is a sectional view on the line 6--6 of Fig. 1, and 35 Fig. 7 is an enlarged view in elevation of th folded-over flange of the carbon sheet, illustrating the means for positioning the sheet in a typewriter when making a record on the copy sheet.

' The invention may be carried out in several 40 different ways, the-embodiment of this application being exemplary of one practical form, and referring more particularly to the drawing in which like reference numerals refer to the same parts throughout the several views, I designates a copy 4 5 lor record sheet provided at one end with an extension or finger portion 2, andv at its opposite end with a central cut-away portion 3, for pur-- poses that will appear presently. It will be understood that the record from the hectograph 5o carbon sheet is made in a typewriting machine on the sheet I, and the latter-is'used for reprod ucing either by the gelatin pad method or on a rotary style duplicating machine, and the record can be made on thevsheet I for use with 55 either of these types of apparatus, although the present structure is intended more particularly for use with the rotary spirit type of duplicator.

It is necessary to maintain the copy sheet I in operative relationship to ,the carbon coated sheet during the typewriting operation, and to permit quick and easy separation of the sheets after-- wards without likelihood of contact between the operators ,fingers and the carbon coating. vTo accomplish this, the copy sheet I is positionedagainst the carbon coating or hectograph ink coating 4 of the carbon sheet 5 which may be -formed of any suitable weight paper, preferably of somewhat lighter weight than that of the copy sheet I.

The carbon sheet 5 is scored or folded at one end at 6, affording the integral flange 1 which is adapted to be bent back on the body of the carbon sheet and "to overlie the copy sheet. I as shown in Fig. 1. *At its opposite edge, the car-v bon coated sheet is scored or folded at 8 and cut away at the center at 9 to afford tabs or`anges I0 on opposite sides of the center, adapted to be bent back over the body of the carbon sheet and to overlie the copy sheet I, as also illustrated in Fig. 1. The carbon coating 4 on the` sheet 5 preferably extends to the lines -I I'and I2, affording narrow uncoated surfaces between the ends of the coating 4 and the folds or creases 6 and 8, while the flange 1 and tabs I0 are also uncoated with carbon material. j

"The carbon coated and copy sheets are independent of eachother and readily assembled, although normally held in operative relationship asv shown in Fig. 1, with the copy sheet overlying the hectograph coating 4, and protecting the operators ngers from contact therewith. After a record is made on ,the copy sheet I, the latter is removedv by the operator gripping the Bange 'I on one side and the outer surface of the carbon sheet on the other side, holding the carbon sheet in this fashion, and gripping the nger portion or extension 2 of the copy sheet at the other end. Then by exerting a slight pulling action on the iinger portion 2, the tabs I0 are forced outwardly and the copy sheet thus easily removed. This operation is facilitated by ,the cut-away portion 3 of the copy sheet, permitting the gripping of 'the ange v1 and the body of the carbon coated sheet at the central point of thev flange 1 without exerting any tension or holding action on the copy sheet.

It will be understood that a suitable record may be made on the-copy sheet for either the spirit or rotary style of reproducer. or for thegelatin pad type of machine. For the first mentioned use, the sheets are inserted in a typewriter so that the writing takes place on the outer surface of the copy sheet I as in Fig. 4, and the carbon record then appears in reverse on the opposite surface of the copy sheet I, resulting from the adjacent carbon coated surface 4.

In order tomake a record for a gelatin pad 'type of machine, a supplemental sheet of paper is preferably placed against the outer-surface of the carbon coated sheet and the three sheets in serted into a typewriter so that the writing takes place on the outer surface.` of said supplemental or third sheet. The type pressing through the supplemental or third sheet and through the carbon coated sheet impress the carbon coating on to the undersurface of the copy sheet I whereA the typewritten record appears in positive, ready to be transferred to the gelatin pad.

If desirableythe carbon coated sheet can bev used more than once by fresh copy sheets, until the coating material is sufficiently exhausted from the coated sheet so that it no longer functions satisfactorily. vA copy sheet is inserted by slipping the end carrying the recess 3 underneath the flange 1, between'y it and thel coated surface 4, and then bending the sheet I sumciently to bring its opposite end under the tabs or flanges I0, when they are positioned as shown in Fig. 1, the sheets being then ready for insertion into a typewriter.

Where the carbon coated sheet is used several times for making successive records on` a multiplicity of copy sheets, it is desirable to use every portion of the carbon coating so far as possible in order to effect uniform wear on lthe latter, and this is effected by positioning the carbon sheet in the typewriter in such ymanner that the lines of typewriting during one typing' operation extend over portions of the coatedfsurface which constitute spaces between the lines of typewriting during a succeeding operation.

`This can be brought about in a variety of ways, and according to one practical adaptation of the invention, there is applied to the ange 1 a series of l spaced lines indicated at I3, at the ends of the flange 1, and suitably designated by 1, 3, 5, '1, etc. I4 designate a similar set of lines at the center of the flange which are arranged parallel to the lines 1, 3, 5 and '1, and approximately in line itsy with the centers of the spaces between said lines l 1, 3, 5 and 7, the centraly lines being designated as 2, 4, 6, 8, etc. When using a carbon coated sheet for the rst time, it is arranged 'in the typewriting machine so that the line of typewriting corresponds with one of the lines 1, at the ends of the flange 1, and when using the carbon coated sheet-for the second time, it is positioned in the typewriting'machine so that the line of writing coincides with the line 2. Continuing, when the carbon sheet is used for the third time, the line -of typewriting is set to one `of the lines at the 'ends numbered 3, and so on. In this manner,

certain parallel zones of the carbon coated material are used during one typewriting operation,

and during a succeeding typewriting operation,

the alternate spaces between said parallel zones 'become the typewriting zones and receive the the other sheet and holding it against accidental displacement, while permitting ready separation of the sheets by pulling them in opposite directions against the, holding action of the flangesfor tabs, which together with the copy sheet, protect the, operators fingers against smudging or soiling by the ink of the coating material. and while the invention has been described with -reference to a particular embodiment, it is not restricted to the exact construction or arrangement shown. and this application 'is intended to cover any modifications Ior departures coming withiii the purposes of the invention or the scope of the following claims.

I claim: A

l. The combination with a sheet for use in making hectograph reproductions having a car- 'bon coating on one side, of a copy sheet separate from the carbon sheet and positioned against said coated surface, and means carried by one of said sheets engaging the outer surface of the other of said sheets and acting to hold them removably in operative relationship.

2. The combination with a sheet for use in making hectograph reproductions having a carbon coating on one side, of a copy sheet separate from the carbon sheet and positioned against said coated surface, and portions carried by one of said sheets at opposite edges thereof bent back upon,

the body of the sheet to overlie the outer surface of the other of said sheets and acting to hold them removably in operative relationship.

3. The combination with a sheet for use in making hectograph reproductions having a carbon coating on one side, of a copy sheet separate from the carbon sheet and positioned against said 20 coatedA surface, a'ange extending along one edge 'of one of said sheets and tabs'arranged at the ends of the opposite edge of said sheet, said ange and tabs being bent back on the body portion of the sheet to overlie the outer surface of 25 the other of said sheets and acting to hold them removably in operative relationship, the last mentioned sheet having a finger portion extending beyond the carbon coated sheet between said tabs enabling its removal from the carbon coated sheet, and a central cut-away portion at its oppoa site edge.

4. The combination with a sheet for use in making hectograph reproductions having a carbon coating on one side, of a copy sheet separate from the carbon sheet and positioned against said coated surface, integral portions extending from the carbon sheet and positioned against said coated surface, an integral ange extending along one edge of said carbon coated sheet and integral tabs arranged at the ends of the opposite edge of said sheet, said flange and tabs overlying the outer surface of the copy sheet and vholding the sheets in operative relation and the last mentioned sheet having a finger portion extending between said tabs enabling the sheets to be separated.

RICHARD V. BOWMAN. 

